Howard, I suspect your friend`s 360 has benefitted from regular use but from all I have read and watched over the years, I suspect that 360 is a bit of a unicorn. I have had hands on with a 400i which was a wonderful engine.. Air cooled Porsches up till the 3.2 were very reliable and powerful enough in their day, expensive to repair in terms of parts cost but nothing a home mechanic could not handle. Once electronics and driver aids such as improved suspension, power steering, ABS entered the scene even air cooled became a tad complex to resolve possible issues... All the hype around IMS and bore score was felt to be blown out of proportion, but if either happened then it was not hype but reality and very expensive reality at that with the IMS issue potentially wrecking the whole engine often at car park speeds... Such issues existed through the water cooled range from 996 right up to 997.2 at which time the engine design was altered....Though Porsche introduced an insurance based extended warranty scheme, to cover "manufacturing faults" and an owner with the warranty, and suffered an IMS failure, could have his engine replaced FOC, if it had a full Porsche service history, and not suffered abuse such as over revs etc..
My 991.1 is covered by the extended warranty, but I would trust my old Trad +8 on a European trip, more than I would any modern digitally managed machine such is the complexity of their systems, whereby even apparently simple issues can take professionals way,way too long to try to resolve....Seem to remember a Morgan brake light issue causing much frustration, and more than one attempt at a dealership to resolve it....!!!!
Seems since vehicles went digital it became a licence for dealerships to print money...!
As ever each to their own
